The 25 contractors pulling the most building permits in Great Falls, ranked by PermitStack's activity score — built from 39,947 permits on file. Updated from live public records.
| # | Contractor | Permits | Score | Top trades | Last permit |
|---|---|---|---|---|---|
| 1 | FALLS MECHANICAL SERVICE | 921 | 84 | hvac, interior_remodel, mechanical | Jun 2026 |
| 2 | GILL'S HEATING & COOLING INC. | 666 | 77 | hvac, interior_remodel, mechanical | Jun 2026 |
| 3 | LIBERTY ELECTRIC INC | 577 | 94 | addition, electrical, fire_alarm | Nov 2025 |
| 4 | ELECTRIC CITY PLUMBING LLC | 553 | 80 | hvac, interior_remodel, mechanical | Jun 2026 |
| 5 | CMG ELECTRIC LLC | 519 | 78 | addition, electrical, hvac | Jul 2025 |
| 6 | CAT GRAPHICS INC | 383 | 71 | addition, electrical, interior_remodel | Jun 2026 |
| 7 | KINDRED PLUMBING & HEATING INC | 382 | 51 | hvac, interior_remodel, mechanical | Jul 2025 |
| 8 | BRENNAN HEATING CO INC | 376 | 86 | electrical, hvac, interior_remodel | Jun 2026 |
| 9 | TERRY LIGGETT CONSTRUCTION | 331 | 66 | demolition, plumbing | Jun 2026 |
| 10 | SERVICE PLUMBERS | 326 | 51 | plumbing | Jun 2022 |
| 11 | FALLS PLUMBING | 276 | 73 | hvac, mechanical, plumbing | May 2025 |
| 12 | GRIZZLY PLUMBING | 268 | 71 | electrical, hvac, interior_remodel | Aug 2025 |
| 13 | UNITED ELECTRIC | 257 | 99 | addition, electrical, fire_alarm | Jul 2025 |
| 14 | CASCADE ELECTRIC INC | 252 | 80 | electrical, fire_alarm | Dec 2024 |
| 15 | NORTHERN HEATING & COOLING | 250 | 70 | hvac, interior_remodel, mechanical | Jun 2026 |
| 16 | PALAGI PLUMBING | 246 | 75 | mechanical, plumbing | Jun 2026 |
| 17 | BLUE RIBBON ELECTRIC INC | 231 | 82 | electrical, hvac, roofing | Jun 2026 |
| 18 | Central Plumbing & Heating | 226 | 78 | demolition, hvac, interior_remodel | Jun 2026 |
| 19 | MACDONALD HEATING & COOLING | 226 | 70 | hvac, interior_remodel, mechanical | Dec 2025 |
| 20 | HARANT HEATING COOLING & REMODELING | 189 | 63 | addition, hvac, interior_remodel | Jun 2024 |
| 21 | MISSION ELECTRIC | 176 | 78 | electrical, interior_remodel | Jun 2026 |
| 22 | Action Plumbing & Construction | 176 | 60 | interior_remodel, mechanical, plumbing | Oct 2024 |
| 23 | BEST VALUE PLUMBING & ROOTER | 175 | 68 | plumbing | Jun 2026 |
| 24 | ELECTRIC CITY CONCRETE, LLC | 174 | 40 | foundation | Dec 2021 |
| 25 | UNITED MATERIALS INC | 172 | 74 | demolition, interior_remodel, plumbing | Dec 2025 |
"Score" is a 0–100 activity index from permit volume, recency, project value, and geographic reach. "Permits" counts building permits this contractor pulled in Great Falls.
Query contractors, scores, and permits programmatically — GET /v1/contractors/search?state=MT&sort=score